its hard to advise whats best for someone , im not even 100% sure i want a plasma , although ill probably get one , the 42g10 plasma is great for sd in my opinion ,of the lcds, the sony w5500 is said to be very good too , samsung 40b650 , philips 42 or even 47pfl7404 are all within your budget , best to go and check them out , if you do , dont be seduced by the really bright lcds in store , when you get one home you will probably end up using the movie , cinema preset , which wont be as punchy , but will give a more natural picture , by the same token , plasmas dont look their best instore , due to the bright lighting and the tendency of salespeople to have them set to shop (way to bright) settings , again , once in your living room , properly set up , a plasma will look much better , if you like watching movies , with the lights dimmed , or even off , a plasma may be more suitable , a plasma also arguably looks more like a crt .. hope that helps ...
also , any of the above would be great for bluray , hd , and dvds upscaled on a ps3 or bluray player , and the picture would be much better than a crt with hd ... sd is also catching up with crts on hdtvs , nearly on a par in my opinion ...